Sale 1: (Dupe)

Sold for Purple Confetti Milkman (16.5)

No outpost

Seller: http://backpack.tf/profiles/76561198150447896#!/compare/1460073600/1460160000

Buyer: http://backpack.tf/profiles/76561198112041789#!/compare/1459641600/1460332800

X = 17 (Rounded from 16.5)

Sale 2:

Sold for 17 keys

http://www.tf2outpost.com/trade/28138320 - B/O of 17

Seller: http://backpack.tf/profiles/76561198142207206#!/compare/1462406400/1462579200

Buyer: http://backpack.tf/profiles/76561198068953870#!/compare/1462147200/1462579200

X = 17

Sale 3: (Dupe)

Sold with Three-Rune Blade for Spec. KS Aces High Gilded Guard

http://www.tf2outpost.com/trade/28138493 - Offers

Seller: http://backpack.tf/profiles/76561198074718580#!/compare/1462406400/1462492800

Buyer: http://backpack.tf/profiles/76561198054213113#!/compare/1462406400/1462492800

X = 16

Sale 4: (Dupe)

Sold with ~4 keys in items for Smoking Tree (20)

http://www.tf2outpost.com/trade/28201278 - B/O of 16

Seller: http://backpack.tf/profiles/76561198054213113#!/compare/1465689600/1465776000

Buyer: http://backpack.tf/profiles/76561198146091426#!/compare/1465603200/1465776000

X + 4 = 20

X = 16

Sale 5:

Sold for 14 keys + ~1 key in ref

http://www.tf2outpost.com/trade/28126186 - No B/O

Seller: http://backpack.tf/profiles/76561198076020691#!/compare/1462320000/1462406400

Buyer: http://backpack.tf/profiles/76561198142207206#!/compare/1462406400/1462579200

X = 15

Sale 6:

Sold for 14 keys?

No outpost

Seller: http://backpack.tf/profiles/76561198055224435#!/compare/1462492800/1462579200

Buyer: http://backpack.tf/profiles/76561198002757046#!/compare/1462492800/1462579200

X = 14

Sale 7:

Sold for 12 keys + Strange Spec. KS Pretty Boy’s Pocket Pistol in less than a day

http://www.tf2outpost.com/trade/28145882 - B/O of 13

Seller: http://backpack.tf/profiles/76561198148727507#!/compare/1462492800/1462579200

Buyer: http://backpack.tf/profiles/76561198263587665#!/compare/1462579200/1462665600

X = 13

Sale 8:

Sold for 13 keys in less than a day

No outpost

Seller: http://backpack.tf/profiles/76561198263587665#!/compare/1462579200/1462665600

Buyer: http://backpack.tf/profiles/76561198055224435#!/compare/1462492800/1462579200

X = 13

Sale 9: (Dupe)

Sold for Planets Waxy Wayfinder (and a conga)

No outpost

Seller: http://backpack.tf/profiles/76561198063783607#!/compare/1462320000/1462406400

Buyer: http://backpack.tf/profiles/76561198074718580#!/compare/1462320000/1462406400

X = 13

Sale 10: (Dupe)

Sold for 9 keys?

No outpost

Seller: http://backpack.tf/profiles/76561198237492194#!/compare/1463270400/1463356800

Buyer: http://backpack.tf/profiles/76561198082001166#!/compare/1463270400/1465257600

X = 9?

Sellers:

16 keys:

http://puu.sh/pAqjF/d753a01e5d.png - 1 month

19 keys:

http://www.tf2outpost.com/trade/28256747 - 6 days

20 keys:

http://www.tf2outpost.com/trade/28047340 - 2 months

Sales at:

9

13

13

13

14

15

16

16

17

17

9 is too low due to buyers

A seller at 16 going 1 month old would normally prove 16 to be too high, however, there are 4 sales at, or higher than, 16 keys. One of the sales being full pure, also. Therefore, keeping 16 and 17 in the range.

Going with 13-17